An unmanned aerial vehicle material delivery device for urban disasters

Abstract

The application discloses an unmanned aerial vehicle material dispenser for urban disasters, which comprises an unmanned aerial vehicle body, a winding wheel is arranged below the unmanned aerial vehicle body, a cable is wound on the winding wheel, a support is arranged outside the winding wheel, the support is connected with the unmanned aerial vehicle body, a first motor and a gear box are arranged at the end of the support, and a power output shaft of the gear box is connected with a central shaft of the winding wheel; the winding wheel is arranged, the cable is wound on the winding wheel, the free end of the cable is provided with a hook, when the unmanned aerial vehicle body hovers, the length of the cable in the vertical state can be adjusted by rotating the winding wheel, the hook is hung on the material to be delivered or the material to be delivered is taken off from the hook, the quick delivery of the material is supported, the efficiency of the material delivery is improved, and the material is prevented from being damaged due to the delivery from the high altitude.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of substance delivery equipment, in particular to a kind of unmanned aerial vehicle material delivery device for urban disaster. BACKGROUND

[0002] When natural disasters (such as earthquakes, floods, typhoons, volcanic eruptions, etc.) and man-made disasters (such as industrial accidents, terrorist attacks, etc.) occur, the disaster area often faces the serious problem of shortage of materials. These materials are crucial to protect the life safety and basic living needs of the disaster victims. For example, in the rubble area after an earthquake, survivors may be trapped in a small space and urgently need food, drinking water, medical supplies to maintain life; The people in the flood area may be trapped in high places and lack the necessary lifesaving equipment, warm materials and clean drinking water. In the case of large-scale disaster, a large amount of disaster relief materials need to be quickly and accurately delivered to the disaster site.

[0003] In the case of road damage due to disasters (such as road breakage and landslides caused by earthquakes, road flooding, etc.), ground rescue vehicles often cannot reach the disaster area in time. Even if the road is partially passable, the passage of a large number of vehicles may cause traffic congestion and delay the transportation of materials. Moreover, for some remote mountainous areas or islands and other special terrain areas, ground transportation is costly and inefficient. Ground transportation is also affected by weather conditions, such as heavy rain and snow weather, which may make it difficult or even dangerous for vehicles to travel.

[0004] With the rise of unmanned aerial vehicle technology, unmanned aerial vehicles have the advantages of high flexibility and are not limited by ground transportation conditions. Therefore, unmanned aerial vehicles can perform tasks in complex terrain and adverse weather conditions (within their flight performance range). Small unmanned aerial vehicles can be used for rapid reconnaissance of disaster areas, providing real-time images and information feedback to the command center to provide the basis for material delivery decisions. Large unmanned aerial vehicles can carry a certain weight of disaster relief materials and deliver them in relatively accurate locations. And unmanned aerial vehicles can work in a cluster to improve the efficiency and coverage of material delivery.

[0005] Currently, there are many unmanned aerial vehicles for material delivery, such as a rescue unmanned aerial vehicle for convenient material delivery disclosed in a Chinese patent with publication number CN113859542B, which includes an unmanned aerial vehicle body, a placement mechanism connected to the unmanned aerial vehicle body, a connection mechanism installed inside the unmanned aerial vehicle body, a support mechanism connected to the unmanned aerial vehicle body, an extrusion mechanism installed on the placement mechanism, a limiting mechanism installed on the extrusion mechanism, a delivery mechanism installed inside the unmanned aerial vehicle body, and a locking mechanism connected to the placement mechanism.

[0006] From the above patent disclosure, before the unmanned aerial vehicle transfers and drops the material, the material needs to be collected in the placement box, and the placement box is fixedly arranged below the unmanned aerial vehicle. Therefore, when the unmanned aerial vehicle continuously drops the material, it needs to land each time and take off after the material is loaded into the placement box. This operation consumes a long time and is not conducive to efficiently completing the dropping of the material. If the material is directly mounted below the unmanned aerial vehicle, and the unmanned aerial vehicle flies to the corresponding position and directly air drops, it is extremely likely to cause damage to the material. SUMMARY

[0007] The present application aims to provide an unmanned aerial vehicle material dropper for urban disasters, aiming to improve the problem that the unmanned aerial vehicle landing to load the material consumes time and affects efficiency, and air dropping is easy to cause damage to the material.

[0008] The present application is implemented as follows: an unmanned aerial vehicle material dropper for urban disasters, comprising an unmanned aerial vehicle body, a winding wheel arranged below the unmanned aerial vehicle body, a cable arranged on the winding wheel, a support arranged on the outer side of the winding wheel, the support being connected with the unmanned aerial vehicle body, a first motor and a gear box arranged at the end of the support, the power output shaft of the gear box being connected with the central shaft of the winding wheel, an adjusting mechanism arranged below the winding wheel, the adjusting mechanism comprising two sets of support frames and two sets of bottom plates, the two sets of bottom plates being respectively arranged below the two sets of support frames, and the two sets of support frames being respectively arranged on the two sides of the support.

[0009] Preferably, a polygonal groove is arranged on the end face of the central shaft of the winding wheel away from the gear box, and a brake mechanism is arranged on the side edge of the polygonal groove, the brake mechanism comprising a polygonal column, an end column and a support disc, the polygonal column being fixedly arranged on the side edge of the end column, and the end column being arranged through the support disc.

[0010] Preferably, a counterbore is arranged on the support disc, a groove is arranged on the sidewall of the counterbore with a smaller diameter, the end column is arranged through the counterbore by a bearing, and the bearing is located at the larger diameter of the counterbore.

[0011] Preferably, a convex column is fixedly arranged on the sidewall of the end column away from the bearing, the convex column and the groove are arranged along the thickness direction of the support disc, the end of the groove is arranged as an opening, the convex column is located in the groove, and the arc length of the groove is greater than the diameter of the convex column.

[0012] Preferably, a second motor, a threaded rod and a limiting rod are arranged at the end of the support, the threaded rod and the second motor are arranged close to each other, gears are arranged on the output shaft of the second motor and the end of the threaded rod, the two gears are connected by meshing, and the limiting rod is located on the side of the threaded rod away from the second motor.

[0013] Preferably, an internally threaded pipe and a sleeve are fixedly arranged on the support disc, the internally threaded pipe is threadedly sleeved on the threaded rod, and the sleeve is sleeved on the limiting rod.

[0014] Preferably, a connecting mechanism is arranged on the top of the base plate, the connecting mechanism is sleeved on the support frame, a threaded column is arranged on each support frame, a third motor is arranged at the end of a support frame, the power output shaft of the third motor is connected with the threaded column, and the two threaded columns are connected through a transmission shaft.

[0015] Preferably, the connecting mechanism comprises a first plate and a second plate, the first plate and the second plate are connected through bolts and are sleeved on the support frame, an arc-shaped groove is arranged on the side wall of the second plate, a ball is arranged in the arc-shaped groove, an arc-shaped groove is arranged on the support frame, and the ball is also arranged in the arc-shaped groove.

[0016] Preferably, a support frame is arranged above the unmanned aerial vehicle body, a plurality of perforations are arranged on the support frame, a plurality of limiting plates are adjustably arranged above, a plurality of batteries are arranged on the support frame in a penetrating manner through the perforations, and the limiting plates are arranged across the top of the plurality of batteries.

[0017] Preferably, a buckle groove is arranged on the upper side of the support frame, a buckle plate is fixedly arranged at the bottom of the limiting plate, a limiting bolt is threadedly arranged on the side edge, the buckle plate is located in the buckle groove, and the bottom of the limiting bolt abuts against the upper side of the support frame.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] The present application is provided with a winding wheel, and a cable is wound on the winding wheel, and the free end of the cable is provided with a hook. When the unmanned aerial vehicle body hovers, the length of the cable in the vertical state can be adjusted by rotating the winding wheel, so as to hang the hook on the to-be-dropped material or take the to-be-dropped material off the hook, thereby providing support for the rapid dropping of the material, improving the efficiency of the material dropping, and avoiding damage to the material caused by dropping from a high altitude.

[0020] The polygonal column can enter and exit the polygonal groove on the central shaft of the winding wheel, so that the central shaft can be controlled to stop rotating by the cooperation of the polygonal column and the polygonal groove, the length of the cable in the vertical state is maintained, and the to-be-dropped material is stably placed relative to the unmanned aerial vehicle body.

[0021] The present application is provided with an adjustable position bottom plate below the winding wheel. After the to-be-dropped material rises to the vicinity of the winding wheel, the position of the bottom plate is adjusted to control the bottom plate to clamp the to-be-dropped material, so that the to-be-dropped material remains relatively stationary with the unmanned aerial vehicle body, thereby avoiding the influence of wind force on the flight of the unmanned aerial vehicle body. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the whole application;

[0023] Figure 2 is a structural diagram of the winding wheel and the adjusting mechanism of the present application;

[0024] Figure 3 is a structural diagram of the winding wheel of the present application;

[0025] Figure 4 is a structural diagram of the winding wheel of the present application;

[0026] Figure 5 is a structural diagram of the braking mechanism of the present application;

[0027] Figure 6 is a structural diagram of the adjusting mechanism of the present application;

[0028] Figure 7 is a structural diagram of the support frame and the bottom plate of the present application;

[0029] Figure 8 is a structural diagram of the connecting mechanism of the present application;

[0030] Figure 9 is a structural diagram of the battery and the support frame of the present application;

[0031] Figure 10 is a structural diagram of the support frame of the present application;

[0032] Figure 11 is a structural diagram of the limiting plate of the present application.

[0033] In the figure: 1, unmanned aerial vehicle body; 11, rotor; 2, winding wheel; 21, support; 22, gear box; 23, first motor; 24, second motor; 25, gear; 26, threaded rod; 27, polygonal groove; 28, limiting rod; 3, adjusting mechanism; 31, transmission shaft; 32, support frame; 321, arc-shaped groove; 322, threaded column; 33, bottom plate; 34, third motor; 35, connecting mechanism; 351, first plate; 352, ball; 353, arc-shaped groove; 354, second plate; 4, battery; 41, support frame; 42, perforation; 43, buckle groove; 44, limiting plate; 441, buckle plate; 442, limiting bolt; 5, braking mechanism; 51, polygonal column; 52, end column; 53, convex column; 54, support disc; 55, internally threaded tube; 56, bearing; 57, sleeve; 58, counterbore; 59, groove. DETAILED DESCRIPTION

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0036] Example 1

[0037] like Figures 1-5 As shown, to enable continuous material delivery missions without requiring the drone to land and wait for material loading, and to avoid damage to materials dropped from heights, this embodiment provides a new delivery device. This device includes a drone body 1 and a reel 2. The reel 2 is located below the drone body 1, and a cable is wound onto the reel 2. A hook can be attached to the lower end of the cable, and the hook is attached to the material to be delivered. When the drone body 1 is hovering, the length of the cable in a vertical position can be adjusted by rotating the reel 2, providing support for attaching the hook to the material to be delivered or removing the material from the hook, thus enabling rapid delivery of materials. This improves the efficiency of material delivery and avoids damage caused by dropping materials from heights.

[0038] The above-mentioned unmanned aerial vehicle body 1 is the prior art, which includes a fuselage, a motor, a propeller, a battery, a main control board, sensors (such as an accelerometer, a gyroscope, a GPS module, etc.), a remote controller, etc. The fuselage is the main frame of the unmanned aerial vehicle, which serves to connect and carry other components. The motor is a key component of the power of the unmanned aerial vehicle. Commonly used are brushless motors and brushless motors. Brushless motors are widely used in most modern unmanned aerial vehicles due to their high efficiency, long service life, low noise, etc. For example, in aerial photography unmanned aerial vehicles, brushless motors can provide stable power output, making the unmanned aerial vehicle fly more smoothly. The speed of the motor can be accurately adjusted according to the instructions of the flight controller, so as to control the flight attitude and speed of the unmanned aerial vehicle. The propeller is connected to the motor and generates lift through the rotation of the motor. The material of the propeller is usually plastic or carbon fiber, and the carbon fiber propeller is lighter and more solid, but the cost is higher. The propeller here can also be called rotor 11. Multi-rotor unmanned aerial vehicles generally have 4 or more propellers, and different propeller speeds are used to realize various flight movements, such as ascending, pitching, rolling and yawing. The main control board is like the brain of the unmanned aerial vehicle, which integrates various sensors and processors. The processor is responsible for running the flight control algorithm, calculating the flight state of the unmanned aerial vehicle according to the data transmitted by the sensor, and issuing instructions to control the speed of the motor and other parameters to realize stable flight. For example, in some open-source flight control systems, the main control board can realize custom flight modes and functions through programming. The battery is the main energy supply component. Commonly used is a lithium battery, which has a high energy density and can provide sufficient power support for the unmanned aerial vehicle. The capacity and performance of the battery directly affect the endurance time of the unmanned aerial vehicle.

[0039] The accelerometer is used to measure the acceleration of the UAV in three axial directions (x, y, z), helping to determine the motion state of the UAV, such as acceleration, deceleration, ascent, descent, etc. It obtains acceleration information by sensing the inertial force of the object, and is an important component for realizing attitude stability control. The gyroscope mainly measures the angular velocity of the UAV, that is, the speed of the UAV rotating around each axis. In cooperation with the accelerometer, the attitude of the UAV can be calculated more accurately, such as roll, pitch, and yaw angles. When the UAV performs rapid movements or flies in a complex airflow environment, the data of the gyroscope is crucial for maintaining the stability of the flight attitude. The GPS (Global Positioning System) module is used to obtain the geographical position information of the UAV, including longitude, latitude, and altitude. The GPS module enables the UAV to realize autonomous flight, route planning, and precise positioning. In some application scenarios that require automatic return or flight along a preset route, the GPS module plays an indispensable role. The remote controller usually contains components such as joysticks, buttons, and switches. The joystick is used to control the flight attitude of the UAV, such as ascending and descending, turning left and right, flying forward and backward, etc.; the buttons and switches are used to realize some special functions, such as take-off, landing, mode switching, etc. The remote controller is connected with the UAV through wireless communication technology, and the common communication frequency bands are 2.4GHz and 5.8GHz. The operator sends flight instructions to the UAV through the remote controller.

[0040] In order to adjust the length of the vertical state of the cable by rotating the winding wheel 2, a support 21 is provided on the outer side of the winding wheel 2, and the support 21 is connected with the UAV body 1. A first motor 23 and a gear box 22 are connected at the end of the support 21, the first motor 23 is connected with the main control board through a cable, and the power output shaft of the gear box 22 is connected with the central shaft of the winding wheel 2. Therefore, the rotation of the winding wheel 2 can be controlled by the operation of the first motor 23, the winding and unwinding of the cable are realized, and the length of the vertical state of the cable is adjusted, which facilitates the lifting of the lifting belt to place the dropped materials near the UAV body 1, or controls the slow descent of the materials. The connection mode of the motor and the main control board has been disclosed, which is briefly introduced here. The main control board usually contains motor driving circuits, which are responsible for converting the control signals of the main control board into signals with sufficient power to drive the motor. For small power motors, the power transistors (such as MOSFET) on the main control board can be directly used to drive the motor; while for high-power motors, special motor driver chips or modules are needed.

[0041] In order to enable the dropped materials to be placed stably relative to the UAV body 1 after adjusting the height of the dropped materials, a brake mechanism 5 needs to be provided at the end of the winding wheel 2, which can limit the rotation of the winding wheel 2 according to the needs to keep it stationary, thereby controlling the stationary of the dropped materials relative to the UAV body 1.

[0042] Specifically, the brake mechanism 5 comprises a polygonal column 51, an end column 52 and a support disc 54, the polygonal column 51 is fixedly arranged at the side of the end column 52 and the end thereof is inserted into the polygonal slot 27, and the end column 52 penetrates through the support disc 54. The polygonal slot 27 is arranged on the end surface of the central shaft of the winding wheel 2, thus, under the condition that the end column 52 is stationary relative to the support disc 54, the central shaft and the winding wheel 2 are limited to be stationary under the cooperation of the polygonal column 51 and the polygonal slot 27, so as to realize the stable placement of the to-be-dropped materials.

[0043] In order to enable the stable placement of the end column 52 relative to the support disc 54, realize the braking of the central shaft and provide convenience for the insertion of the polygonal column 51 into the polygonal slot 27, a counterbore 58 is arranged on the support disc 54, a groove 59 is arranged on the sidewall of the counterbore 58 with a smaller diameter, the end column 52 is connected and arranged through the counterbore 58 by means of a bearing 56, and the bearing 56 is located at the larger diameter of the counterbore 58, so as to realize the stable connection of the end column 52 and the support disc 54. A convex column 53 is fixedly arranged on the sidewall of the end column 52 deviating from the bearing 56, the convex column 53 and the groove 59 are arranged along the thickness direction of the support disc 54, the end of the groove 59 is arranged as an opening, the convex column 53 is located at the groove 59, the arc length of the groove 59 is greater than the diameter of the convex column 53, and the top end of the polygonal column 51 is arranged with a chamfer, the size of the chamfer is determined according to actual requirements. When the support disc 54 drives the end column 52 and the polygonal column 51 to move, because the end of the polygonal column 51 is arranged with a chamfer, thus, in the process of inserting the polygonal column 51 into the polygonal slot 27, the polygonal column 51 can be rotated for a short distance under the cooperation of the polygonal slot 27 and the chamfer, until the end of the polygonal column 51 is inserted into the polygonal slot 27. In the process of rotating the polygonal column 51, the convex column 53 moves in the groove 59. Then, under the cooperation of the convex column 53 and the groove 59, the central shaft and the winding wheel 2 are controlled to be stationary, so as to realize the stable placement of the to-be-dropped materials.

[0044] In order to control the rotation of the winding wheel 2, a second motor 24, a threaded rod 26 and a limiting rod 28 are arranged at the end of the support 21, the threaded rod 26 and the second motor 24 are arranged adjacent to each other, and the threaded rod 26 is movably arranged relative to the support 21 under the action of a bearing connection, a gear 25 is arranged on the output shaft of the second motor 24 and the end of the threaded rod 26, and the second motor 24 is connected with the main control board, and the two gears 25 are meshed and connected, so that the threaded rod 26 can be controlled to rotate under the action of the second motor 24. The limiting rod 28 is located on the side of the threaded rod 26 away from the second motor 24. An internally threaded tube 55 and a sleeve 57 are fixedly arranged on the support disc 54, the internally threaded tube 55 is threadedly sleeved on the threaded rod 26, and the sleeve 57 is sleeved on the limiting rod 28. Under the cooperation of the threaded rod 26, the internally threaded tube 55, the sleeve 57 and the limiting rod 28, the support disc 54 is stably and movably arranged relative to the support 21, so that the support disc 54 can drive the end column 52 and the polygonal column 51 to move under the rotation of the threaded rod 26, thereby controlling the polygonal column 51 to enter and exit the polygonal groove 27, and the control of the winding wheel 2 is realized.

[0045] Example 2

[0046] As Figure 1 , Figures 6-8 shown, on the basis of example 1, in order to stably arrange the to-be-dropped material under the unmanned aerial vehicle body 1, avoid the influence of wind force on the to-be-dropped material and affect the flight of the unmanned aerial vehicle body 1, an adjusting mechanism 3 is arranged below the winding wheel 2, the adjusting mechanism 3 includes two sets of support frames 32 and two sets of bottom plates 33, the two sets of bottom plates 33 are adjustably arranged below the support frames 32 respectively, and the two sets of support frames 32 are arranged on the two sides of the support 21. Therefore, when the winding wheel 2 controls the to-be-dropped material to rise to the vicinity below the winding wheel 2, the position of the bottom plate 33 is adjusted to clamp the to-be-dropped material, so that the to-be-dropped material can be stably placed relative to the winding wheel 2 and the unmanned aerial vehicle body 1. In addition, if the device needs to be temporarily landed, the bottom plate 33 first contacts the ground to support the stable parking of the unmanned aerial vehicle body 1.

[0047] Specifically, the connecting mechanism 35 is arranged on the top of the bottom plate 33 and sleeved on the support frame 32, a threaded column 322 is arranged on each support frame 32 and threaded through the top of the bottom plate 33, so that the bottom plate 33 can be controlled to move relative to the support frame 32 when the threaded column 322 rotates, thereby adjusting the position of the bottom plate 33. A third motor 34 is arranged at the end of the support frame 32, the power output shaft of the third motor 34 is connected with the threaded column 322, the two threaded columns 322 are connected through the transmission shaft 31, and the third motor 34 is connected with the main control board, so that the third motor 34 can be controlled to work to force the two threaded columns 322 to rotate at the same time, thereby simultaneously adjusting the positions of the two bottom plates 33, and facilitating clamping the material to be put through the bottom plate 33.

[0048] In order to stably install the bottom plate 33 relative to the support frame 32, the connecting mechanism 35 includes a first plate 351 and a second plate 354, the first plate 351 and the second plate 354 are connected through bolts and sleeved on the support frame 32, so that the bottom plate 33 is stably and movably installed relative to the support frame 32. In order to reduce the resistance of the connecting mechanism 35 relative to the support frame 32, an arc-shaped groove 353 is arranged on the side wall of the second plate 354, a ball 352 is arranged at the arc-shaped groove 353, an arc-shaped groove 321 is arranged on the support frame 32, and the ball 352 is also located in the arc-shaped groove 321, so that the friction between the connecting mechanism 35 and the support frame 32 can be reduced through the rolling of the ball 352.

[0049] Embodiment 3

[0050] As shown in Figure 1 , Figures 9-11 on the basis of embodiments 1 or 2, in order to stably install the battery 4 on the unmanned aerial vehicle body 1 and facilitate dismounting and replacing the battery 4, a support frame 41 is arranged above the unmanned aerial vehicle body 1, a plurality of through holes 42 are arranged on the support frame 41, a plurality of limiting plates 44 are adjustably arranged above, a plurality of batteries 4 are arranged at the support frame 41 through the through holes 42, and the limiting plates 44 are arranged across the top of the plurality of batteries 4, thereby stably installing the batteries 4 on the unmanned aerial vehicle body 1.

[0051] In order to facilitate adjusting the position of the limiting plate 44 before replacing the battery 4, a buckle groove 43 is arranged on the upper side of the support frame 41, a buckle plate 441 is fixedly arranged on the bottom of the limiting plate 44 and threaded limiting bolts 442 are arranged on the side edges, the buckle plate 441 is located in the buckle groove 43, the limiting plate 44 is stably and movably connected with the support frame 41, the bottom of the limiting bolt 442 abuts against the upper side of the support frame 41, the resistance of the relative movement between the limiting plate 44 and the support frame 41 can be increased, and the limiting plate 44 can be manually controlled to move.

[0052] The battery 4 is connected to the main control board, and the connection technology has been disclosed, which is briefly introduced as follows. The positive pole of the battery is connected to the power input pin of the main control board through a power line, and the negative pole is connected to the ground pin of the main control board. Inside the main control board, the power input pin is connected to a series of power management circuits. These circuits mainly include filter circuits, voltage stabilizing circuits, etc. The filter circuit is used to remove the noise and interference signals in the power supply, for example, a filter network composed of capacitors and inductors can effectively reduce the high-frequency noise in the battery output voltage. The voltage stabilizing circuit is responsible for converting the unstable voltage output by the battery into a stable voltage to meet the working voltage requirements of various chips and elements on the main control board, etc.

[0053] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drone-based material delivery system for urban disaster relief, comprising a drone body (1), characterized in that, A take-up reel (2) is provided below the UAV body (1). A cable is wound on the take-up reel (2), and a bracket (21) is provided on the outside of the take-up reel (2). The bracket (21) is connected to the UAV body (1), and a first motor (23) and a gearbox (22) are connected at its end. The power output shaft of the gearbox (22) is connected to the central shaft of the take-up reel (2). An adjustment mechanism (3) is provided below the take-up reel (2). The adjustment mechanism (3) includes two sets of support frames (32) and two sets of base plates (33). The two sets of base plates (33) are respectively adjustable and set below the support frames (32). The two sets of support frames (32) are respectively set on both sides of the bracket (21). A polygonal groove (27) is provided on the end face of the winding reel (2) away from the gearbox (22), and a braking mechanism (5) is provided on the side. The braking mechanism (5) includes a polygonal column (51), an end column (52) and a support plate (54). The polygonal column (51) is fixedly provided on the side of the end column (52), and its end can be inserted into the polygonal groove (27). At the same time, the end column (52) is provided through the support plate (54). A connecting mechanism (35) is provided on the top of the base plate (33), and the connecting mechanism (35) is sleeved on the support frame (32); a threaded column (322) is provided on each support frame (32), and a third motor (34) is provided at the end of a certain support frame (32), and the power output shaft of the third motor (34) is connected to the threaded column (322); two threaded columns (322) are connected by a transmission shaft (31); The connecting mechanism (35) includes a first plate (351) and a second plate (354), which are connected by bolts and sleeved on the support frame (32). An arc-shaped groove (353) is provided on the side wall of the second plate (354), and a ball bearing (352) is provided in the arc-shaped groove (353). An arc-shaped groove (321) is provided on the support frame (32), and the ball bearing (352) is also located in the arc-shaped groove (321).

2. The unmanned aerial vehicle (UAV) material delivery device for urban disaster relief according to claim 1, characterized in that, The support plate (54) is provided with a countersunk hole (58), and a groove (59) is provided on the side wall of the countersunk hole (58) with a smaller diameter. The end post (52) is connected through the countersunk hole (58) by a bearing (56), and the bearing (56) is located at the larger diameter of the countersunk hole (58).

3. A drone-based material delivery system for urban disaster relief according to claim 2, characterized in that, A protruding post (53) is fixedly provided on the side wall of the end post (52) away from the bearing (56). The protruding post (53) and the groove (59) are both arranged along the thickness direction of the support plate (54), and the end of the groove (59) is set as an opening. Meanwhile, the protruding post (53) is located at the groove (59), and the arc length of the groove (59) is greater than the diameter of the protruding post (53).

4. A drone-based material delivery system for urban disaster relief according to claim 1, characterized in that, A second motor (24), a threaded rod (26), and a limiting rod (28) are provided at the end of the bracket (21). The threaded rod (26) and the second motor (24) are arranged close to each other, and gears (25) are provided on the output shaft of the second motor (24) and at the end of the threaded rod (26). The two gears (25) are meshed and connected. The limiting rod (28) is located on the side of the threaded rod (26) away from the second motor (24).

5. A drone-based material delivery system for urban disaster relief according to claim 1, characterized in that, An internally threaded tube (55) and a sleeve (57) are fixedly installed on the support plate (54). The internally threaded tube (55) is threaded onto the threaded rod (26), and the sleeve (57) is sleeved onto the limiting rod (28).

6. A drone-based material delivery system for urban disaster relief according to claim 1, characterized in that, A support frame (41) is provided above the main body (1) of the drone. The support frame (41) has multiple perforations (42) and multiple limiting plates (44) are adjustablely provided above it. Multiple batteries (4) are distributed through the perforations (42) at the support frame (41). The limiting plates (44) are arranged across the top of the multiple batteries (4).

7. A drone-based material delivery system for urban disaster relief according to claim 6, characterized in that, A buckle groove (43) is provided on the upper side of the support frame (41), a buckle plate (441) is fixedly provided on the bottom of the limiting plate (44), and a limiting bolt (442) is threaded through the side. The buckle plate (441) is located in the buckle groove (43), and the bottom of the limiting bolt (442) is pressed against the upper side of the support frame (41).

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